Hair roller



FIG. 1 is a front elevational view of a hair roller, showing my new design;

FIG. 2 is a right-side elevational view thereof;

FIG. 3 is a left-side elevational view thereof;

FIG. 4 is a front plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a rear plan view thereof. 

CLAIM The ornamental design for a hair roller, as shown and described. 